Portable ice plant



FIG. 1 is a front 3/4 quarter perspective view of a portable ice plantshowing my new design;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The ornamental design for a portable ice plant, substantially as shown.